[nova] Create for all client and non-client lib wallaby branch

This creates the stable/wallaby branch for all client and non-client libraries
now that we are past the lib freeze on March 11.

If a team wants to wait for a specific patch to make it to the library,
someone from the team can -1 the patch to have it held,or update that
patch with a different commit SHA.

Patches with no response will be merged by Friday, March 19.

Change-Id: I13ce499587559978fc22423ab31b75c4fc935f63

deliverables/wallaby/os-vif.yaml

@@ -16,3 +16,6 @@ releases:
     projects:
       - repo: openstack/os-vif
         hash: 6167658e5b61b5408c4a631cc41b7bfc6f16f164
+branches:
+  - name: stable/wallaby
+    location: 2.4.0

deliverables/wallaby/osc-placement.yaml

@@ -11,3 +11,6 @@ releases:
     projects:
       - repo: openstack/osc-placement
         hash: f7640c9efad0715c4cd36f88897b1732aa689488
+branches:
+  - name: stable/wallaby
+    location: 2.2.0

deliverables/wallaby/python-novaclient.yaml

@@ -15,3 +15,6 @@ releases:
     projects:
       - repo: openstack/python-novaclient
         hash: 54d4da112a6e84db5bda497364a49b9debfc2904
+branches:
+  - name: stable/wallaby
+    location: 17.4.0